Overall Green alert Tropical Cyclone for JOBO-21
in Tanzania, Seychelles
21 Apr 2021 12 UTC
click on to select bulletin time
  • GDACS JTWC
Impact Single TC
Impact based on all weather systems in the area

Impact

    Tropical Cyclone JOBO-21 can have a low humanitarian impact based on the maximum sustained wind speed,exposed population and vulnerability.

    Meteorological source GDACS
    Exposed countries Tanzania, Seychelles
    Exposed population No people in Category 1 or higher
    Maximum wind speed 111 km/h
    Maximum storm surge 0.4 m (25 Apr 12:00 UTC)
    Vulnerability Medium (Tanzania)
    Landfall between
    25 Apr 2021 12:00 - 26 Apr 2021 12:00
    in Tanzania

    GDACS Score

    GDACS alert score for Tropical Cyclones is 0.5 (GREEN Alert), 1.5 (ORANGE Alert), 2.5 (RED Alert)
    For more info on GDACS alert score click here.
      Wind Storm surge Rainfall GDACS score
    Current 139 km/h 0.4 m n.a. 0.5
    Overall 111 km/h 0.4 m n.a. 0.5

    Maximum winds, storm surge, rainfall (Current: over the next 72 h, Overall: entire TC track) based on GDACS impact

    TOP

    Wind

      139 km/h Current Max.

      Up to <1000 people in Category 1 strength or higher (see SSHS)

      Impact Timeline

        Alert N° Date (UTC) Max Winds (km/h) Population in
        Tropical Storm or higher        		 Population in
        Cat 1. or higher        		 Countries
        Green 1 21 Apr 2021 00:00 130 580 thousand No people Seychelles, Tanzania
        Green 2 21 Apr 2021 12:00 139 1.6 million Few people Seychelles

        Bulletin Timeline

          Alert N° Date (UTC) Category
          (SSHS)           		Max winds
          (km/h)           		Population in
          Cat.1 or higher           		Population in
          Tropical Storm
          or higher           		Location (lat, lon) Countries
          GREEN
          		 1 21 Apr 2021 00:00 Tropical storm 83 no people <1000 people -10, 48.8
          GREEN
          		 2 21 Apr 2021 12:00 Tropical storm 111 no people <1000 people -9.7, 47.8
          GREEN
          		 2 22 Apr 2021 00:00 Category 1 130 <1000 people <1000 people -9.6, 46.8
          GREEN
          		 2 22 Apr 2021 12:00 Category 1 139 no people <1000 people -9.5, 45.6
          GREEN
          		 2 23 Apr 2021 00:00 Category 1 130 no people no people -9.3, 44.4
          GREEN
          		 2 23 Apr 2021 12:00 Tropical storm 111 no people no people -9, 43.5
          GREEN
          		 2 24 Apr 2021 12:00 Tropical storm 93 no people 480000 people -8.5, 41.7
          GREEN
          		 2 25 Apr 2021 12:00 Tropical storm 102 no people 1.6 million people -8, 40
          GREEN
          		 2 26 Apr 2021 12:00 Tropical depression 56 no people no people -7.6, 38 Tanzania
          Actual track of the current bulletin
          The alert for forecast greater than 3 days is limited to Orange level.
          Download:



          Exposed population - AoIs

          Exposed population in the potential affected countries, provinces and populated places

          Countries

          Country
          Seychelles

          Provinces

          Region Province Country
          Seychelles Seychelles

          Critical infrastructure

          Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

          Airports

          Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft)
          Assumption Island 3 Civ. Paved No 3900

          Ports

          Name LOCODE Country
          Assumption Island Seychelles
          TOP

          Rainfall

          Rainfall accumulation of the past 24h, as detected by the Global Precipitation Measurement mission of NASA. For more information, see https://www.nasa.gov/mission_pages/GPM/main/index.html.

          ...

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          StormSurge

          0.4 m

          The maximum Storm surge height is  0.4m in Mwera, Tanzania. This height is estimated for 25 Apr 2021 12:00 UTC .

          The JRC has developed an experimental global storm surge model. The calculations are published about 20 minutes after a new advisory is detected by GDACS. The calculations identify the populated places affected by storm surge up to three days in advance, using the forecasted track. When forecasts change, the associated storm surge changes too and alert levels may go up or down. All links, data, statistics and maps refer to the latest available calculation. If the calculation for the last advisory is not completed, the latest available calculation is shown.

          Locations affected by Storm surge (14 locations). Calculation based on advisory number 2 of 21 Apr 2021 12:00:00 UTC. (Simulation using 0.5 minute resolution)

          Alert Date (UTC) Name Country Storm surge height (m)
          25 Apr 2021 12:00 Mwera Tanzania  0.4
          25 Apr 2021 12:00 Mkarangama Tanzania  0.3
          25 Apr 2021 12:00 Chole Tanzania  0.3
          25 Apr 2021 12:00 Kilindoni Tanzania  0.3
          25 Apr 2021 12:00 Jimbo Tanzania  0.2
          25 Apr 2021 12:00 Kiombani Tanzania  0.2
          25 Apr 2021 12:00 Mchungu Tanzania  0.2
          25 Apr 2021 12:00 Nyambati Tanzania  0.2
          25 Apr 2021 12:00 Kiechuru Tanzania  0.2
          25 Apr 2021 12:00 Mbwera Tanzania  0.2
          25 Apr 2021 12:00 Kipingwe Tanzania  0.2
          25 Apr 2021 12:00 Kirongwe Tanzania  0.1
          25 Apr 2021 12:00 Jaja Tanzania  0.1
          25 Apr 2021 12:00 Pombwe Tanzania  0.1